Over time, Superman's strength was increased to the point where he could move entire planets. The character gained the power of true flight. Superman's speed increased to the point where he could travel faster than light. He could use this power to travel through time as well as fly to other worlds, solar systems and galaxies and even to other universes with relative ease, as shown in his visits to the 30th century as a member of the Legion of Super-Heroes
. By the 1970s, Superman was able to withstand the explosion of nuclear weapons with no risk whatsoever and fly unharmed through the core of a star. Superman was also able to regenerate physical damage to his body at an accelerated rate[citation needed
] and could survive without air, water, or food. Superman was immune to basically everything except for Kryptonite radiation and magic.
Superman possessed x-ray vision, allowing him to see through solid objects (except through lead), as well as telescopic vision (seeing great, even interstellar distances) and microscopic vision (seeing small things, even subatomic particles). These powers could be used individually or in conjunction with one another. His eyes could also perceive the full electromagnetic spectrum including infrared and ultraviolet frequencies of radiation. Originally depicted as a by-product of his x-ray vision, Superman's "heat vision" allowed him to generate energy beams which could be used to melt or vaporize almost any substance.
Superman could hear sound at almost any wavelength and at vast distances. Superman's breath was capable of freezing objects (because his lungs were able to put air under tremendous pressure, thus super-cooling it) and generating hurricane-force winds. Superman could throw his voice across great distances. This power was used to confuse enemies or protect his secret identity by tricking others into believing that he (or Clark Kent) was in a different location.
Superman possessed genius-level intelligence and an eidetic memory
. These enhanced mental capabilities were a direct result of his exposure to a yellow sun. Superman also possessed the mental ability to screen out the enormous amount of information received by his enhanced senses and to focus on a single detail such as a particular voice or location.
Writers of Superman experimented with new powers for the character. The abilities that proved popular became part of his regular repertoire, while others were discarded after a single use. In addition to his other super senses, Superman was occasionally shown as having highly-enhanced senses of touch and smell.